CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Operating Revenues	$ 162,434	$ 143,141	$ 141,592
Operating Expenses:
Operations and Maintenance	79,096	73,671	70,796
Depreciation	23,029	21,109	18,472
Other Taxes	18,208	15,150	14,904
Total Operating Expenses	120,333	109,930	104,172
Gain on Sale of Subsidiary	5,232
Operating Income	47,333	33,211	37,420
Other Income (Expense):
Allowance for Funds Used During Construction	2,314	2,653	4,016
Other Income (Expense), net	5,389	3,305	363
Total Other Income, net	7,703	5,958	4,379
Interest Charges	9,367	8,114	7,493
Income before Income Taxes	45,669	31,055	34,306
Income Taxes	3,240	(5,488)	(4,119)
Net Income	42,429	36,543	38,425
Preferred Stock Dividend Requirements	120	120	120
Earnings Applicable to Common Stock	$ 42,309	$ 36,423	$ 38,305
Earnings per share of Common Stock:
Basic (in Dollars per share)	$ 2.4	$ 2.08	$ 2.19
Diluted (in Dollars per share)	$ 2.39	$ 2.07	$ 2.18
Common Shares Outstanding :
Basic (in Shares)	17,597	17,492	17,459
Diluted (in Shares)	17,712	17,607	17,574